标题: 94% of observations lie within +-4 standard deviations of the mean.中文怎样解 [打印本页] 作者: 黄非红 时间: 2008-2-25 22:17 标题: 94% of observations lie within +-4 standard deviations of the mean.中文怎样解
94% of observations lie within +-4 standard deviations of the mean.中文怎样解释比较恰当?谢谢作者: 胡老师 时间: 2008-3-6 11:58